Wire-drawing machine.



H. L. THOMPSON. WIRE DRAWING MACHINE. APPLICATION FILED DBo.1o,19o6.

935,336. i Patented 991.15.28, 1909.

2 SHEETS-SHEET 1.

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935.336. Patented Sept.28, 1909. 2 EEEEEEEEEEEE 2.

UNITED STATES IPATENT OFFTCE.

HUGH L. THOMPSON, OF WATERBURY, CONNECTICUT.

WIRE-DRAWING- MACHINE.

To all whom it may concern:

Be it known that I, HUGH L. THOMPSON, a citizen of the United States,residing at Taterbury, in the county of New Haven and State ofConnecticut, have invented a new and useful lire-Drawing Machine, ofwhich the following is a specification.

My invention relates to improvements in wire drawing machines.

My object is to provide improved means for securing the wire andproviding for a gradual drawing-out operation before laying the same onthe periphery of the block, whereby the rotation of the block may bebegun at substantially maximum speed without danger of snapping the wireby the sudden starting of the drawing operation.

Referring to the drawings Figure 1 is a plan view of my device in thepreliminary or starting position. Fig. 2 is a vertical section. Fig. 8is a plan view with the block still in the initial position and afterthe gripper has made its preliminary movement before com ing intoengagement with the block. Fig. 4 is a plan View showing the relativeposition of the parts after the block has made a half revolution.

Similar numerals refer to similar parts throughout the several views.

The block 5 is loosely mounted on the spindle 6. On the top of spindle 6is provided the crank pin 7 on which is journaled the gripper member 8and is secured in position by the screw 21. The block 5 is recessed asat 9 to receive said crank pin and gripper member and to permit alimited rotative movement of the shaft and crank pin independent of theblock. The die holder 10 is of the usual form having a vertical journalbearing as at 11 and a horizontal journal bearing as at 12 to providefor the universal movement of said die holder. The die is indicated at18. The gripper member is provided with the jaws 14E sliding inconvergent ways in said die holder and operated by the hand lever 15pivoted to the gripper member 8 at 16. The spindle 6 is driven throughgears 17 and pinion 18 from any suitable source of power.

The operation of my device is as follows: The wire is secured by thegripper jaws when the block 5, gripper member 8 and die holder. 10 arein the position shown in Fig. 1, that is, the die holder and grippermember are in a line with the radius of the shaft 6. Upon thepreliminary rotation of shaft G in Specification of Letters Patent.

Application led December 10, 1906.

Patented Sept. 2S, 1909.

serial No. 347,059.

the direction of the arrow the crank pin 7 moves from the position shownin Fig. 1 to the position shown in Fig. 3, whereupon the crank pin andsurrounding portion of the gripper member S have reached the linnt ofthe recess 9 and engages with the margin thereof. By this movement ofthe shaft, crank pin and gripper member the wire is given a very gradualdrawing movement through the die. lVhen the gripper member engages withthe block in the position shown in Fig. 3 the further movement of theshaft causes the rotation of the block and the gradual drawing operationof the wire continues until the block has reached the position in whichthe wire engages the spiral portion 19 of Vthe blocks periphery. Themaximum speed of wire drawing begins when the full periphery of theblock is reached at the point 20, see Fig. 3, and the wire drawing thencontinues at maximum speed until the operation is completed.

An important fea-ture of the construction shown, is that the axis of theactuating shaft or spindle and the axis of the pivotal movement of thegripper member, may be as close together as desired irrespective of therelative dimensions of said shaft and of the crank pin or pivotconnection of the gripper..

What I claim is 1. In a wire drawing machine, the combination of ablock, a spindle loosely seated therein, a crank pin on the spindle, agripper j ournaled on the crank pin, and means for establishingoperative relationship between the spindle and the block after certainpreliminary movement of the spindle and consequent preliminary movementof the gripper.

2. In a wire drawing machine, the combination of a rotatable blockhaving a radially extending recess, a shaft loosely journaled in theblock, a crank pin projecting from the top of the shaft into the recess,a gripper member journaled to the crank pin and lying in the recess ofthe block, the walls of the recess adapted to engage with the gripperwhen the shaft rotates, the parts being so proportioned and arranged asto permit of a free preliminary movement of the gripper in the recessupon the movement of the shaft and before the establishment of operativerelationship between the shaft and the block.

3. In a wire drawing macnine, the combination of a rotatable blockhaving a radially extending recess, a shaft loosely journaled CJI in theblock, a crank pin projecting from the top of the shaft intoV therecess, a gripper then be Withdrawn Within the periphery of the block bya preliminary movement of the member journaied to the Crank pin andlying lshaft.

in the recess of the block, the parte being so C proportioned andarranged that the gripper shall extend beyond the periphery of the blockin the preliminary position and shall HUGH L. THOMPSON. VitnessesCAROLINE SCI-IUROH, C. VALTER CHILDS.

